package chapter05.Example08;

public class E8 {
    public static void main(String[] args) {
        System.out.println("1 添加-------------");
        add();
        System.out.println("1 添加-------------");
        remove();
        System.out.println("1 添加-------------");
        alter();
    }
    public static void  add(){
        StringBuffer sb = new StringBuffer();
        sb.append("itcast");
        System.out.println(sb);
        sb.insert(2,"123");
        System.out.println( sb);
    }
    public static void  remove(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println(sb);
        sb.deleteCharAt(2);
        System.out.println("sb = "+ sb);
        sb.delete(0,sb.length());
        System.out.println("sb = "+ sb);
    }
    public static void  alter(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("sb = "+ sb);
        sb.replace(1,3,"qq");
        System.out.println("sb = "+ sb);
        System.out.println(sb.reverse());
    }
}
